diff options
Diffstat (limited to 'libre/sdl/SDL-1.2.15-CVE-2019-7635-Reject-BMP-images-with-pixel-colors-ou.patch')
| -rw-r--r-- | libre/sdl/SDL-1.2.15-CVE-2019-7635-Reject-BMP-images-with-pixel-colors-ou.patch | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/libre/sdl/SDL-1.2.15-CVE-2019-7635-Reject-BMP-images-with-pixel-colors-ou.patch b/libre/sdl/SDL-1.2.15-CVE-2019-7635-Reject-BMP-images-with-pixel-colors-ou.patch deleted file mode 100644 index fb899d5f3..000000000 --- a/libre/sdl/SDL-1.2.15-CVE-2019-7635-Reject-BMP-images-with-pixel-colors-ou.patch +++ /dev/null @@ -1,67 +0,0 @@ -From beef32b0e510371f3c968d22a1e3d48abbf366c6 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com> -Date: Tue, 19 Feb 2019 14:52:52 +0100 -Subject: [PATCH] CVE-2019-7635: Reject BMP images with pixel colors out the - palette -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -If a 1-, 4-, or 8-bit per pixel BMP image declares less used colors -than the palette offers an SDL_Surface with a palette of the indicated -number of used colors is created. If some of the image's pixel -refer to a color number higher then the maximal used colors, a subsequent -bliting operation on the surface will look up a color past a blit map -(that is based on the palette) memory. I.e. passing such SDL_Surface -to e.g. an SDL_DisplayFormat() function will result in a buffer overread in -a blit function. - -This patch fixes it by validing each pixel's color to be less than the -maximal color number in the palette. A validation failure raises an -error from a SDL_LoadBMP_RW() function. - -CVE-2019-7635 -https://bugzilla.libsdl.org/show_bug.cgi?id=4498 - -Signed-off-by: Petr Písař <ppisar@redhat.com> ---- - src/video/SDL_bmp.c | 16 ++++++++++++++++ - 1 file changed, 16 insertions(+) - -diff --git a/src/video/SDL_bmp.c b/src/video/SDL_bmp.c -index 3accded..8eadc5f 100644 ---- a/src/video/SDL_bmp.c -+++ b/src/video/SDL_bmp.c -@@ -300,6 +300,12 @@ SDL_Surface * SDL_LoadBMP_RW (SDL_RWops *src, int freesrc) - } - *(bits+i) = (pixel>>shift); - pixel <<= ExpandBMP; -+ if ( bits[i] >= biClrUsed ) { -+ SDL_SetError( -+ "A BMP image contains a pixel with a color out of the palette"); -+ was_error = SDL_TRUE; -+ goto done; -+ } - } } - break; - -@@ -310,6 +316,16 @@ SDL_Surface * SDL_LoadBMP_RW (SDL_RWops *src, int freesrc) - was_error = SDL_TRUE; - goto done; - } -+ if ( 8 == biBitCount && palette && biClrUsed < (1 << biBitCount ) ) { -+ for ( i=0; i<surface->w; ++i ) { -+ if ( bits[i] >= biClrUsed ) { -+ SDL_SetError( -+ "A BMP image contains a pixel with a color out of the palette"); -+ was_error = SDL_TRUE; -+ goto done; -+ } -+ } -+ } - #if SDL_BYTEORDER == SDL_BIG_ENDIAN - /* Byte-swap the pixels if needed. Note that the 24bpp - case has already been taken care of above. */ --- -2.20.1 - |